Fire-box arch and arch bricks therefor



Oct. 16, 1923.

J. P. NEFF F IRE BOX ARCH AND ARCH BRICKS THEREFOR Fild Feb. 6.

1920 2 Sheets-Sheet 1 A TTORNEY6 Oct. 16, 1923. 1,470,697

v J. P. NEFF FIRE BOX ARCH AND ARCH BRICKS THEREFOR Fi led Feb. 6, 1920 2 Sheets-Sheet 2 ATTORNEYS Passed ea. 1e,-1923.

UNITE I .Arfear erie- 1 JOHNTPL me o-MAST ORA GE, new JEnsnY, essrenon To Anaemia 21363 cm;

PANY, A CORPORATION onDELA ARE.-

FIRE-BOX ARCH Ann ARCH nierCKs' THnnn'roR,

Application filed February 6, 1920. Serial ms. 256,653.

To all whom it may concern."

Be it known that I, JOHN P. Nnrr, a citizen o f the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Fire-BOX Arches and Arch Bricks Therefor, of which the following is a specification.

This invention relates to refractory arches and arch-bricks for fire boxes, and particularly to that style of arch wherein the bricks "are rested upon'supporting bars or tubes such, for example, as the circulation tubes rfrequentlyiutilized inlocom'otive fire boxes.

The construction of my inventienis par ti'cularly useful in connectionwith fire boxes wherein the s'upporting o'r circulation tubes are set at an unsually steep angle.

It is theprimary Object of'i'n v invention to provide an arch,'the bricks of which-are so constructed and positioned as to cause theni to tightly grip the si'ipportingj tubes in order to prevent possibility of dis I placement under the influence of the draft or onaccount of the steepness ofthe angle at which they rest. Furthermore, I have so constructed the bricks that the greater .the displacing force the greater will be the g i ping action and the more tightly and securelvwill the arch be held in position.

Another object of. the invention is the provision of "an arch composed of 15111 rality of bricks arranged in pairs each pair being supported between two tubes and each brickbeing constructed with a tube engag ing surface on one edge and an oblique brick 1 engaging surface on the other edge; the

bricks being reversible soas to bring the "buck engaging surfaces together 111 each :pair of bricks. A still further object of the invention is the provision of bricks'which,

when placed together in pairs as specified, will be adjustable to variations in tube spac I ines;

psaii another object of the invention is the 'provisionof a brick constructed with a support engaging surface on one edge and a brick engaging" ,surface on the other edge having the support engaging surface, and

ing'the supportengagingsurface to the edge havinigithe' brick, engaging surface, the I v A I ,brick engaging'surface :13, 0bl1q uel y disbricks so constructed being adapted 'to be supported between two tubes. The pairs are preferably arranged n rows transversely ofthe fire box andwhere bricks with diverging ends are used this arrangement p'rog duces a series'of-perforations through the arch, whichperforations surround the tubes.

These, together with such other objects as are incident to my invention or herelnafter. appear; I obtaln byme'ansof a construction, illustrated in preferred "form 1 iii the accompanying drawing, wherein Figure 1 is a vertical longitudinal section; through a fire box illustrating iny invehtion as supported upon circulation-tubes; Figure 2 is a horizontal'sectionthrough a portion of the fire boxtakenon the line of Figure 1 Figure 3. is an enlarged plan view "of a pair of'brijcks embodying; inyinvention and Figuredv an end elevation- 0f Figure 3. Figure 5 is a viewsiinilar to Figure 1 but showing bricks constructed to mam imperforate arch, and Figureo is a section taken "on the ,line "6-6 of Fig'ure' 5 and Figures-7 and 8 are details of the bricks ,used the structureshown in Figures 5 and 6. V V i The drawings illustrate injr'invention as applied to a locomotive firebox" which com-- prises the usual crown sheet 1; inside and outside back sheets, Zan'd 3, side sheets a, flue sheet-5, armrawaie leg 6, and rear water leg 7 between the back sheets 2 and 3.

A series ofbrick supoortingand circulation tubes 8 connect the-forward water-leg 6 to I the rear water leg 7,"the"connection with the rear water leg bein at oint'above the fire'dooropening 9. These circulation tubes, it will.benoticedparelso bent and-set that the angle of inclination from front to back is quite'sharp, the angle at the forwardpor' bodybricks is provided mens-edge with asupport or tube engaging surface 12 which I prefer to'forin in'the shape of socket? "tion being especially steep. Attention is as shown, which engages substantially one 1 half the circumference of theltubeThe other or opposite edge is provided with a support engaging surface. As shown in Figs. 1 to 4 the ends of the brick 1 1 and 15,

and its upper and lowerfaces, 16 and 17,

diverge from the edge having the support engaging surface to theedge having the brick engaging surface. This construction, of course, makes the edge having the brick engaging surface considerably longer than the other edge and the brick considerably thicker on one side than on the other side. The end 15 of the brick is more orlless irregularly formecha s shown, its principal irregularity being the result of the cut away 7 portion 18. In Figsb toS, inclusive,-the

bod bricks 1 0are not formed with the cut y away portion 18 nor with an irregular end asin Figs. 1 to t inclus1ve,'and, therefore,

:the arch which they createis imperforate.

Inotherrespects, however,-they embody'theessential feati'ires; of the invention.

The body bricks are preferably counterQ partsv and are arranged in. pairsbetween tubes. Transversely of the fire box the pairs are arranged in rows, the forward row abutting against the boiler wall and thQ'OtheI'.

rows being successively built up against this row toward the rear of the firebox and ex ten-ding back as; far as may be desired. The

bricks in each pair, as shown; arefreversely arranged so as to-bring the brick engaging surfaces in juxtaposition. Frorn' this arrangement it will be apparent thatany forward movement of the bricks will tend to I through .the flues 19. This upwarddisplacewedge them more tightlyinplace; Furthermore, from the formation of the bricks and of their support engaglng surfaces, t Wlll be seen that the bricks of a pair arch themselves, so to speak, bothupwardly and clownwardlyso as to prevent displacement by the force of gravity or by the force of the draft ment dueto the action of the draft must be guarded against with more than usual posidirection. 5o

I addition to the wedging action which theytiveness in constructions where the arch rests upon tubes which are set' at a steep angle as in. the present case. It will be noted by the construction shown (see Fig. 4) that the pairs of bricks arch themselves in either engaging surfaces in JThe oblique brick 9 give, as above pointed out. permit of a certain amount of adjustability so that bricks of one size may be adapted to variations in tube spacings. 1

"It will be apparent that instead of being :counterparts, the bricksof each pair might only qualification-beingthat they maintain substantially the general characteristics out-V "lined above.

be of different sizes but .complementarmfthe It will be seen that in an arch constructed in accordance with this invention, as showninFigs' l'to 4 there will be formed between ;I each pair of bricks, a passageway or perfoing'devices such as have been ration 20 next to thetubes. These perforations transversely of the arch areshown in .7

alinement so that there will be an opening or free space completely surrounding the tubes through which the gases of combustion can readily pass. These perforations are the result partly of the divergent ends and I partly of the cut away portions 18.

The perforations tend to promote better combustion due to the more thorough admlxture of the gases.-

It will be seen thatby this invention I can construct} an. arch, the bricks of which are easily put in place, and when placed will securely maintain themselves in position and pair being supported between two tubes, and;-

each brick constructed with one edge provided with asocket adapted to embrace a portion of the circumference of a tube, the

opposite edge being cut obliquely withrespect to the socketed'edge, the bricks of :each

- pair beingreversely'arranged so as. to place the two oblique edges together, as and for the purposesset forth. Y

-3.]A tube supported arch composed of a plurality of bricks each of which is provided on one edge with .a tube supporting surface, the opposite edge being cut obliquelywith respect to thesupporting surface, as and for the purposes set forth.

4. Abri'ck for a fire box arch construction having one edge of greater dimension'than the other, the narrower edge being provided with a supporting surface and the other edge'beingcut obliquely with respect to the supporting surface, as and forthe purposes set forth. r I .7 '5. A tube supported'arch composed fof a plurality of bricks arranged in pairs, eachpair being supportedbetween two tubes, and

each brick having one edge provided with a tube engaging surface and the otheredge cut obliquely to the first edge, the oblique edges in each pair of bricks meeting between the tubes, as and for the'purposes Set forth. 1 '5' 6. A'fire box arch composed of a plurality 'of bricks arranged in pairs, spaced supports for the pairs, each'brick provided with a supportengagmg surface on one edge and a brick engaging surface on the opposite edge,

the brick engagingfsurface being cut obliquely with respect to the support engaging 7. A fire box arch composed of'a plurality of bricks, spaced supports, for the bricks,

each brick being constructed with a support engaging surface on one edge, a brick engaging surface on the other edge, and with its ends diverging from the support engaging, surface to the brick engaging surface, the bricks being arranged in pairs in reversed relation, each pair spanning the distance between two supports and there'being perforations through the arch between pairs by virtue of the diverging ends.

8; An arch brick constructed with a supengaging surface on the other edge obliquely disposed with respect to the support engaging surface, and with its ends diverging from the edge having the supporting surface to the edge having the brick engaging surface.

i 9. A11 arch brick constructed with a support engaging'surface on one edge, and a arranged in reversed relation to span such distance. I v I r In testimony whereof, I have hereunto signed myname.

JOHN P. NEFF. 

